The dynamic process of mesocotyl elongation of weedy rice was observed in a germination test in a constant temperature incubator in darkness. The changes in amylase activities in embryos and soluble sugar contents in the process of mesocotyl elongation and their relationship were analyzed. The results showed that during the first three days after germination in darkness, the mesocotyl elongation rate was very slow and accelerated four and five days after germination. The mesocotyl elongation gradually stopped seven days after germination. The mesocotyl of the weedy rice was significantly longer than that of Liaojing 294. In the germination process of weedy rice, soluble sugar contents followed an increasing trend, together with αamylase activity and βamylase activity. Mesocotyl elongation length was significantly correlated with the αamylase activity, βamylase activity and soluble sugar contents. The enhanced amylase activities in the beginning of weedy rice germination promoted starch degradation, supplying material and energy for mesocotyl elengation.
MA Dianrong*, KONG Dexiu， LIU Xiaoliang, GAO Qi， DING Guohua, ZHAO Minghui， TANG Liang， XU Zhengjin, CHEN Wenfu*
. Mesocotyl Elongation of Weedy Rice and Its Relationship with Grain Amylase Activities and Soluble Sugar Contents[J]. Chinese Journal OF Rice Science, 2014
, 28(1)
: 97
-102
.
DOI: 10.3969/j.issn.1001-7216.2014.01.014
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